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Table of contents
1 Introduction
1.1 Notations
1.2 Organization of the thesis
2 Reciprocity Calibration for Massive MIMO
2.1 Introduction
2.1.1 UE aided calibration and Internal calibration
2.1.2 Coherent and Non-coherent calibration scheme
2.1.3 Key assumptions
2.2 State of the Art
2.2.1 Argos
2.2.2 Rogalin Method
2.2.3 Avalanche
2.2.4 Method in [43]
2.3 Group calibration System Model
2.3.1 Least Squares Solution
2.3.2 Fast Calibration
2.3.3 Non-coherent estimation
2.4 Cramer Rao Bound
2.5 Optimal Algorithms
2.5.1 Alternating Maximum Likelihood (AML)
2.5.2 Variational Bayes approach
2.6 Maximum likelihood vs. least squares
2.7 Analysis of least squares methods
2.8 Simulation Results
2.8.1 Comparison of grouping based schemes
2.8.2 Comparison of single antenna transmission schemes
2.9 Summary of Contributions
3 Precoder design under Doppler – Full CSIT
3.1 Introduction
3.1.1 Key Assumption
3.2 System Model
3.3 Precoder Design
3.3.1 Covariance matrix update
3.3.2 Power allocation across the subcarriers
3.3.3 Optimization of window parameters – Gradient descent
3.3.4 Overall Algorithm and Convergence
3.4 Simulation Results
3.5 Summary of Contributions
4 Precoder design under Doppler – partial CSIT
4.1 System Model
4.2 Large MIMO asymptotics
4.2.1 Precoder Design
4.2.2 Simulation Results
4.3 Summary of Contributions
5 Analysis of the Gap between EWSR and ESEI-WSR
5.1 MIMO IBC Signal Model
5.2 EWSR
5.3 MaMIMO limit and ESEI-WSR
5.4 EWSR to ESEI-WSR gap Analysis
5.4.1 Monotonicity of gap with SNR
5.4.2 Second-Order Taylor Series Expansion of EWSR
5.4.3 MISO correlated channel
5.4.4 MIMO zero mean i.i.d channel
5.5 Actual EWSR Gap
5.6 Simulation Results
5.7 Conclusion
5.8 Summary of Contributions
6 Experimental results
6.1 Downlink channel estimation via RCMM.
6.1.1 Massive MIMO testbed
6.1.2 Frame structure
6.1.3 Results
6.2 MU-MIMO precoding for a 2 BS, 2 UE scenario
6.2.1 Channel Estimation
6.2.2 EWSR Lower Bound: EWSMSE
6.2.3 Dual DL precoder
6.2.4 Results
6.3 Multiple antenna based self-interference cancellation for Full Duplex
6.3.1 USRP based testbed
6.3.2 Frame structure
6.3.3 Results
6.4 Summary of Contributions
7 Conclusion
7.1 Contributions
7.1.1 Chapter 2
7.1.2 Chapter 3
7.1.3 Chapter 4
7.1.4 Chapter 5
7.1.5 Chapter 6
